[PATCH -v3 4/7] kexec jump: remove duplication of kexec_restart_prepare()

[Huang Ying]

Call kernel_restart_prepare() in kernel_kexec() instead of duplicating
the code.

Signed-off-by: Huang Ying <ying.huang at intel.com>
Acked-by: Pavel Machek <pavel at suse.cz>
Acked-by: Vivek Goyal <vgoyal at redhat.com>

---
 include/linux/reboot.h |    1 +
 kernel/kexec.c         |    6 +-----
 kernel/sys.c           |    2 +-
 3 files changed, 3 insertions(+), 6 deletions(-)

--- a/include/linux/reboot.h
+++ b/include/linux/reboot.h
@@ -59,6 +59,7 @@ extern void machine_crash_shutdown(struc
  * Architecture independent implemenations of sys_reboot commands.
  */
 
+extern void kernel_restart_prepare(char *cmd);
 extern void kernel_restart(char *cmd);
 extern void kernel_halt(void);
 extern void kernel_power_off(void);
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -274,7 +274,7 @@ void emergency_restart(void)
 }
 EXPORT_SYMBOL_GPL(emergency_restart);
 
-static void kernel_restart_prepare(char *cmd)
+void kernel_restart_prepare(char *cmd)
 {
 	blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
 	system_state = SYSTEM_RESTART;
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1472,11 +1472,7 @@ int kernel_kexec(void)
 	} else
 #endif
 	{
-		blocking_notifier_call_chain(&reboot_notifier_list,
-					     SYS_RESTART, NULL);
-		system_state = SYSTEM_RESTART;
-		device_shutdown();
-		sysdev_shutdown();
+		kernel_restart_prepare(NULL);
 		printk(KERN_EMERG "Starting new kernel\n");
 		machine_shutdown();
 	}